CN115817113A - Pure electric vehicle fan control method and automobile - Google Patents
Pure electric vehicle fan control method and automobile Download PDFInfo
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- CN115817113A CN115817113A CN202211655793.1A CN202211655793A CN115817113A CN 115817113 A CN115817113 A CN 115817113A CN 202211655793 A CN202211655793 A CN 202211655793A CN 115817113 A CN115817113 A CN 115817113A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000017525 heat dissipation Effects 0.000 claims abstract description 150
- 239000000110 cooling liquid Substances 0.000 claims abstract description 68
- 239000003507 refrigerant Substances 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 239000002826 coolant Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to a pure electric vehicle fan control method and an automobile. The method comprises the steps of determining the minimum fan rotating speed meeting the heat dissipation requirement of a condenser based on the rotating speed of a compressor of the air conditioner, the outlet pressure of a refrigerant of the condenser of the air conditioner and the ambient temperature; determining the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the outlet temperature of the all-in-one cooling liquid; determining the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the outlet temperature of the motor cooling liquid; and taking the maximum value of the three minimum fan rotating speeds as the final rotating speed of the electronic fan. Based on condenser heat dissipation demand, unification heat dissipation demand and motor heat dissipation demand more, can carry out real time control to electronic fan under different seasons, different operating mode that traveles, control is reasonable, guarantees the normal operating of parts such as air conditioning system, motor and unification more, when optimizing the radiating effect, has reached energy-conserving purpose.
Description
Technical Field
The invention relates to the technical field of fan control, in particular to a pure electric vehicle fan control method and an automobile.
Background
Electric automobile can produce a large amount of heats in parts working process such as air conditioner condenser, motor and controller, and these heats can not in time effectually distribute away can influence the air conditioner performance, further cause motor and controller temperature to constantly rise, influence the performance and the safety of electric motor car. The fan is an important part in the electric commercial vehicle cooling system, and is also a part with large power consumption in the electric appliance of the whole vehicle, in the past electric vehicle cooling circulation system, after the whole vehicle is electrified, the fan runs immediately, and under the condition that the temperature of cooling water is not high, the electric energy waste can be caused, and the endurance mileage of the whole vehicle is influenced.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the invention provides a pure electric vehicle fan control method and an automobile.
In a first aspect, the invention provides a pure electric vehicle fan control method, which includes: determining a minimum fan speed meeting the heat dissipation requirement of a condenser based on the compressor speed of the air conditioner, the outlet pressure of the condenser refrigerant of the air conditioner and the ambient temperature;
determining the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the temperature of the outlet of the all-in-one cooling liquid;
determining the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the outlet temperature of the motor cooling liquid;
and taking the maximum value of the three minimum fan rotating speeds as the final rotating speed of the electronic fan.
Still further, the determining a minimum fan speed to meet the condenser heat rejection requirement based on the compressor speed of the air conditioner, a condenser refrigerant outlet pressure of the air conditioner, and an ambient temperature comprises:
s201: reading the rotating speed of the compressor, and if the rotating speed of the compressor is a first rotating speed, setting the gear of the minimum rotating speed of the fan meeting the heat dissipation requirement of the condenser as a first gear; otherwise, go to S202;
s202: reading the outlet pressure of the condenser refrigerant, and if the outlet pressure of the condenser refrigerant is less than or equal to a first pressure, setting the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser as a first gear; if the outlet pressure of the condenser refrigerant is higher than the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear; otherwise, turning to S203;
s203: and reading the ambient temperature, and determining the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser based on a first corresponding relation between different refrigerant outlet pressures between the first pressure and the eighth pressure and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser in different ambient temperatures.
Still further, the first corresponding relationship between the different refrigerant outlet pressures between the first pressure and the eighth pressure and the gear of the minimum fan speed for meeting the heat dissipation requirement of the condenser in the different ambient temperatures includes:
if the ambient temperature is lower than or equal to the first temperature, when the pressure of the outlet of the condenser refrigerant is higher than the first pressure and lower than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear;
if the ambient temperature is higher than the second temperature and lower than or equal to the third temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the fourth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the fourth pressure and less than or equal to the seventh pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; if the pressure of the outlet of the condenser refrigerant is greater than the seventh pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear;
if the ambient temperature is higher than the third temperature and lower than or equal to a fourth temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the third pressure, the gear which meets the heat dissipation requirement of the condenser and has the minimum fan rotating speed is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the third pressure and less than or equal to the sixth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; if the outlet pressure of the condenser refrigerant is greater than the sixth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear;
if the ambient temperature is higher than the fourth temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the second pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the second pressure and less than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; and if the pressure of the refrigerant outlet of the condenser is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear.
Further, the determining a minimum fan speed to meet the all-in-one cooling heat dissipation requirement based on the all-in-one cooling fluid outlet temperature includes:
when the temperature of the all-in-one cooling liquid outlet is in the rising trend, determining a gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on a second corresponding relation between the temperature of the all-in-one cooling liquid outlet and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement;
when the all-in-one cooling liquid outlet temperature is in a descending trend, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is determined based on the third corresponding relation between the all-in-one cooling liquid outlet temperature and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement.
Furthermore, the second corresponding relationship between the temperature of the all-in-one coolant outlet and the gear of the minimum fan speed meeting the all-in-one cooling and heat dissipation requirement includes:
when the temperature of the outlet of the all-in-one cooling liquid is less than or equal to the eighth temperature, the gear of the minimum fan rotating speed meeting the requirements of all-in-one cooling and heat dissipation is a first gear; when the all-in-one outlet water temperature is higher than the eighth temperature and lower than or equal to the tenth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is a fourth gear; when the all-in-one outlet water temperature is higher than the tenth temperature and lower than or equal to the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is a sixth gear; when the all-in-one outlet water temperature is higher than the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is an eighth gear;
furthermore, the third corresponding relationship between the temperature of the all-in-one cooling liquid outlet and the gear of the minimum fan speed meeting the all-in-one cooling heat dissipation requirement includes:
when the temperature of the all-in-one cooling liquid outlet is higher than the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is an eighth gear; when the temperature of the all-in-one cooling liquid outlet is higher than the ninth temperature and lower than or equal to the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is a sixth gear; when the temperature of the all-in-one cooling liquid outlet is higher than the seventh temperature and lower than or equal to the ninth temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is a fourth gear; when the temperature of the all-in-one cooling liquid outlet is lower than the seventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the first gear.
Still further, the determining a minimum fan speed to meet the heat dissipation requirement of the motor based on the motor coolant outlet temperature comprises:
and determining the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the fourth corresponding relation between the outlet temperature of the motor cooling liquid and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor.
Still further, the fourth corresponding relationship between the motor coolant outlet temperature and the gear of the minimum fan speed that meets the heat dissipation requirement of the motor includes:
if the temperature of the motor cooling liquid outlet is in a range from the first temperature to the fifth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a first gear;
if the temperature of the motor cooling liquid outlet is in a range from the fifth temperature to the sixth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a second gear;
if the temperature of the motor cooling liquid outlet is in a range from the sixth temperature to the seventh temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a third gear;
if the motor coolant outlet temperature is in the seventh temperature interval to the tenth temperature interval, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a fifth gear;
if the temperature of the motor cooling liquid outlet is in a tenth temperature range to a twelfth temperature range, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a seventh gear;
and when the temperature of the motor cooling liquid outlet is between the twelfth temperature and the thirteenth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the eighth gear.
In a second aspect, the invention provides a pure electric vehicle, which comprises a vehicle body, wherein the vehicle body is provided with at least one control unit for driving a fan, the control unit is connected with a storage unit, the control unit is directly or indirectly connected with a signal acquisition unit, the signal acquisition unit acquires the rotation speed of a compressor of an air conditioner, the outlet pressure of a condenser refrigerant of the air conditioner, the ambient temperature, the outlet temperature of an all-in-one cooling liquid and the outlet temperature of a motor cooling liquid, and the storage unit stores a computer program.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the invention provides a pure electric vehicle fan control method comprehensively considering condenser pressure, motor and all-in-one controller temperature. The pure electric vehicle fan control method is based on condenser heat dissipation requirements, all-in-one heat dissipation requirements and motor heat dissipation requirements, can control the fan in real time in different seasons and different driving working conditions, and meanwhile guarantees normal operation of components such as an air conditioning system, a motor and all-in-one components; the fan control method is finely divided, so that the electric energy is effectively saved, and the endurance mileage of the high-purity electric car is further improved; the fan control method can greatly relieve the problem of frequent gear shifting of the fan, which is beneficial to prolonging the service life of the fan and reducing the instability of the operation of components such as an air conditioning system, a motor, an all-in-one system and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram of a pure electric vehicle fan control method according to an embodiment of the present invention;
FIG. 2 is a flow chart for determining a minimum fan speed to meet the heat dissipation requirements of the condenser based on the compressor speed of the air conditioner, the condenser refrigerant outlet pressure of the air conditioner, and the ambient temperature, according to an embodiment of the present invention;
FIG. 3 is a schematic table of a first correspondence provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of determining a minimum fan speed to meet the all-in-one cooling heat dissipation requirement based on the outlet temperature of the all-in-one cooling fluid according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second corresponding relationship and a third corresponding relationship provided in the embodiment of the present invention;
fig. 6 is a schematic table of a fourth corresponding relationship provided in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Example 1
In the present invention, the following parameters are preset:
set for 8 rotational speed gears for the fan, 8 the rotational speed gear is by low to high respectively: the first gear, the second gear, the third gear, the fourth gear, the fifth gear, the sixth gear, the seventh gear and the eighth gear. In a preferred embodiment, the first gear is 0% full fan speed, the second gear is 10% full fan speed, the third gear is 30% full fan speed, the fourth gear is 33% full fan speed, the fifth gear is 50% full fan speed, the sixth gear is 66% full fan speed, the seventh gear is 70% full fan speed, and the eighth gear is 100% full fan speed.
Two rotating speed reference values are set for an air conditioner compressor, and from low to high, the rotating speed reference values are respectively as follows: a first rotation speed and a second rotation speed. In a preferred embodiment, the first speed is 0% full compressor speed and the second speed is 10% full compressor speed.
Setting 8 pressure reference values for the outlet pressure of the condenser refrigerant, wherein the pressure reference values from low to high are respectively as follows: a first pressure, a second pressure, a third pressure, a fourth pressure, a fifth pressure, a sixth pressure, a seventh pressure, and an eighth pressure. In a preferred embodiment, the first pressure is 1.1Mpa, the second pressure is 1.5Mpa, the third pressure is 1.6Mpa, the fourth pressure is 1.7Mpa, the fifth pressure is 1.8Mpa, the sixth pressure is 1.9Mpa, the seventh pressure is 2.2Mpa, the eighth pressure is 2.4Mpa;
defining 13 temperature reference values which are respectively from low to high: the first temperature, the second temperature, the third temperature, the fourth temperature, the fifth temperature, the sixth temperature, the seventh temperature, the eighth temperature, the ninth temperature, the tenth temperature, the eleventh temperature, the twelfth temperature, and the thirteenth temperature. In a preferred embodiment, the first temperature is-50 ℃, the second temperature is 20 ℃, the third temperature is 30 ℃, the fourth temperature is 40 ℃, the fifth temperature is 45 ℃, the sixth temperature is 48 ℃, the seventh temperature is 50 ℃, the eighth temperature is 55 ℃, the ninth temperature is 56 ℃, the tenth temperature is 60 ℃, the eleventh temperature is 61 ℃, the twelfth temperature is 65 ℃ and the thirteenth temperature is 100 ℃.
Referring to fig. 1, the method for controlling a fan of a pure electric vehicle according to the embodiment of the present invention includes:
s100, the rotating speed of the compressor, the ambient temperature, the outlet pressure of the refrigerant of the condenser, the outlet temperature of the all-in-one cooling liquid and the outlet temperature of the cooling liquid of the motor are obtained in advance.
And S200, determining the minimum fan rotating speed meeting the heat dissipation requirement of the condenser based on the rotating speed of the compressor of the air conditioner, the outlet pressure of the refrigerant of the condenser of the air conditioner and the ambient temperature.
In a specific implementation process, referring to fig. 2, the determining the minimum fan speed that meets the heat dissipation requirement of the condenser based on the compressor speed of the air conditioner, the condenser refrigerant outlet pressure of the air conditioner and the ambient temperature includes:
s201: judging whether the rotating speed of the compressor is a first rotating speed or not, if so, setting the gear of the minimum rotating speed of the fan meeting the heat dissipation requirement of the condenser as a first gear; otherwise, go to S202;
s202: if the pressure of the outlet of the condenser refrigerant is less than or equal to the first pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a first gear; if the outlet pressure of the condenser refrigerant is higher than the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear; otherwise, turning to S203;
s203: and determining the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser based on the first corresponding relation between different refrigerant outlet pressures between the first pressure and the eighth pressure and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser in different environment temperatures.
In a specific implementation process, referring to fig. 3, in the different ambient temperatures, the first corresponding relationship between the different refrigerant outlet pressures between the first pressure and the eighth pressure and the gear of the minimum fan speed that meets the heat dissipation requirement of the condenser includes:
if the ambient temperature is less than or equal to the first temperature, when the outlet pressure of the condenser refrigerant is greater than the first pressure and less than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; and if the pressure of the refrigerant outlet of the condenser is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear.
If the ambient temperature is higher than the second temperature and lower than or equal to the third temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the fourth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the fourth pressure and less than or equal to the seventh pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; and if the outlet pressure of the condenser refrigerant is greater than the seventh pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear.
If the ambient temperature is higher than the third temperature and lower than or equal to a fourth temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the third pressure, the gear meeting the heat dissipation requirement of the condenser and with the minimum fan rotating speed is a fourth gear; if the outlet pressure of the condenser refrigerant is greater than the third pressure and less than or equal to the sixth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; and if the outlet pressure of the condenser refrigerant is greater than the sixth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear.
If the ambient temperature is higher than the fourth temperature, when the pressure of the outlet of the condenser refrigerant is higher than the first pressure and lower than or equal to the second pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the second pressure and less than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; and if the pressure of the refrigerant outlet of the condenser is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear.
S300, determining the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the outlet temperature of the all-in-one cooling liquid.
In a specific implementation process, referring to fig. 4, the determining, based on the temperature of the outlet of the all-in-one cooling liquid, the minimum fan speed that meets the requirement of the all-in-one cooling and heat dissipation includes:
s301, when the temperature of the all-in-one cooling liquid outlet is in the rising trend, determining the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the second corresponding relation between the temperature of the all-in-one cooling liquid outlet and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement.
And S302, when the all-in-one cooling liquid outlet temperature is in a descending trend, determining the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the third corresponding relation between the all-in-one cooling liquid outlet temperature and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement.
Referring to fig. 5, in a preferred embodiment, the second corresponding relationship between the all-in-one coolant outlet temperature and the gear of the minimum fan speed meeting the all-in-one cooling heat dissipation requirement includes:
when the temperature of the all-in-one cooling liquid outlet is less than or equal to the eighth temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the first gear.
When the all-in-one outlet water temperature is higher than the eighth temperature and lower than or equal to the tenth temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is the fourth gear.
When the all-in-one outlet water temperature is higher than the tenth temperature and lower than or equal to the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is the sixth gear.
When the all-in-one outlet water temperature is higher than the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is the eighth gear.
The third corresponding relation between the temperature of the all-in-one cooling liquid outlet and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement comprises the following steps:
and when the temperature of the all-in-one cooling liquid outlet is higher than the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is an eighth gear.
When the temperature of the all-in-one cooling liquid outlet is higher than the ninth temperature and lower than or equal to the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the sixth gear.
When the temperature of the all-in-one cooling liquid outlet is higher than the seventh temperature and lower than or equal to the ninth temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the fourth gear.
When the temperature of the all-in-one cooling liquid outlet is lower than the seventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the first gear.
And S400, determining the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the outlet temperature of the motor cooling liquid. In a specific implementation process, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is determined based on the fourth corresponding relation between the outlet temperature of the cooling liquid of the motor and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor.
Referring to fig. 6, the fourth corresponding relationship between the motor coolant outlet temperature and the gear position of the minimum fan speed that meets the heat dissipation requirement of the motor includes:
if the temperature of the motor cooling liquid outlet is in the range from the first temperature to the fifth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the first gear.
And if the temperature of the motor cooling liquid outlet is in the range from the fifth temperature to the sixth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the second gear.
And if the temperature of the motor cooling liquid outlet is in the range from the sixth temperature to the seventh temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the third gear.
And if the temperature of the motor cooling liquid outlet is in the range from the seventh temperature to the tenth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the fifth gear.
And if the temperature of the motor cooling liquid outlet is in the range from the tenth temperature to the twelfth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the seventh gear.
When the temperature of the motor cooling liquid outlet is in the range from the twelfth temperature to the thirteenth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the eighth gear.
And S500, taking the maximum value of the three minimum fan rotating speeds as the final rotating speed of the electronic fan.
Example 2
The invention embodiment provides a pure electric vehicle, which comprises a vehicle body, wherein the vehicle body is provided with at least one control unit for driving a fan, the control unit is connected with a storage unit, the control unit is directly or indirectly connected with a signal acquisition unit, the signal acquisition unit acquires the rotating speed of a compressor of an air conditioner, the outlet pressure of a condenser refrigerant of the air conditioner, the ambient temperature, the outlet temperature of an all-in-one cooling liquid and the outlet temperature of a motor cooling liquid, the storage unit stores a computer program, and the fan control method is realized when the computer program is executed by the control unit, and the method comprises the following steps:
determining a minimum fan speed meeting the heat dissipation requirement of a condenser based on the compressor speed of the air conditioner, the outlet pressure of the condenser refrigerant of the air conditioner and the ambient temperature;
determining the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the temperature of the outlet of the all-in-one cooling liquid;
determining the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the outlet temperature of the motor cooling liquid;
and taking the maximum value of the three minimum fan rotating speeds as the final rotating speed of the electronic fan.
In the embodiments provided herein, it should be understood that the disclosed structures and methods may be implemented in other ways. For example, the above-described structural embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, structures or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A pure electric vehicle fan control method is characterized by comprising the following steps: determining a minimum fan speed meeting the heat dissipation requirement of a condenser based on the compressor speed of the air conditioner, the outlet pressure of the condenser refrigerant of the air conditioner and the ambient temperature;
determining the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on the outlet temperature of the all-in-one cooling liquid;
determining the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the outlet temperature of the motor cooling liquid;
and taking the maximum value of the three minimum fan rotating speeds as the final rotating speed of the electronic fan.
2. The pure electric vehicle fan control method according to claim 1, wherein the determining a minimum fan speed that meets the condenser heat dissipation requirement based on the compressor speed of the air conditioner, the condenser refrigerant outlet pressure of the air conditioner, and the ambient temperature comprises:
s201: reading the rotating speed of the compressor, and if the rotating speed of the compressor is a first rotating speed, setting the gear of the minimum rotating speed of the fan meeting the heat dissipation requirement of the condenser as a first gear; otherwise, go to S202;
s202: reading the outlet pressure of the condenser refrigerant, and if the outlet pressure of the condenser refrigerant is less than or equal to a first pressure, setting the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser as a first gear; if the outlet pressure of the condenser refrigerant is higher than the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear; otherwise, turning to S203;
s203: and reading the ambient temperature, and determining the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser based on the first corresponding relation between the refrigerant outlet pressure of the refrigerator and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser between the first pressure and the eighth pressure in different ambient temperatures.
3. The pure electric vehicle fan control method according to claim 2, wherein the first corresponding relationship between the refrigerant outlet pressure of the refrigerator and the gear of the minimum fan speed meeting the heat dissipation requirement of the condenser in different ambient temperatures between the first pressure and the eighth pressure comprises:
if the ambient temperature is lower than or equal to the first temperature, when the pressure of the outlet of the condenser refrigerant is higher than the first pressure and lower than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear;
if the ambient temperature is higher than the second temperature and lower than or equal to the third temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the fourth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the fourth pressure and less than or equal to the seventh pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; if the outlet pressure of the condenser refrigerant is greater than the seventh pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear;
if the ambient temperature is higher than the third temperature and lower than or equal to a fourth temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the third pressure, the gear which meets the heat dissipation requirement of the condenser and has the minimum fan rotating speed is a fourth gear; if the outlet pressure of the condenser refrigerant is greater than the third pressure and less than or equal to the sixth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; if the pressure of the outlet of the condenser refrigerant is greater than the sixth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear;
if the ambient temperature is higher than the fourth temperature, when the outlet pressure of the condenser refrigerant is higher than the first pressure and lower than or equal to the second pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a fourth gear; if the pressure of the outlet of the condenser refrigerant is greater than the second pressure and less than or equal to the fifth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is a sixth gear; and if the pressure of the refrigerant outlet of the condenser is greater than the fifth pressure and less than or equal to the eighth pressure, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the condenser is an eighth gear.
4. The pure electric vehicle fan control method according to claim 1, wherein the determining a minimum fan speed that meets the all-in-one cooling and heat dissipation requirement based on the all-in-one coolant outlet temperature comprises:
when the temperature of the all-in-one cooling liquid outlet is in the rising trend, determining a gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement based on a second corresponding relation between the temperature of the all-in-one cooling liquid outlet and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement;
when the all-in-one cooling liquid outlet temperature is in a descending trend, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is determined based on the third corresponding relation between the all-in-one cooling liquid outlet temperature and the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement.
5. The pure electric vehicle fan control method according to claim 4, wherein the second corresponding relationship between the all-in-one coolant outlet temperature and the gear of the minimum fan speed that meets the all-in-one cooling and heat dissipation requirement includes:
when the temperature of the all-in-one cooling liquid outlet is less than or equal to the eighth temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is a first gear; when the all-in-one outlet water temperature is higher than the eighth temperature and lower than or equal to the tenth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is a fourth gear; when the all-in-one outlet water temperature is higher than the tenth temperature and lower than or equal to the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is a sixth gear; when the all-in-one outlet water temperature is higher than the twelfth temperature, the gear with the minimum fan rotating speed meeting the all-in-one cooling and heat dissipation requirements is the eighth gear.
6. The pure electric vehicle fan control method according to claim 4, wherein the third corresponding relationship between the all-in-one coolant outlet temperature and the gear of the minimum fan speed that meets the all-in-one cooling and heat dissipation requirement includes:
when the temperature of the all-in-one cooling liquid outlet is higher than the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is an eighth gear; when the temperature of the all-in-one cooling liquid outlet is higher than the ninth temperature and lower than or equal to the eleventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is a sixth gear; when the temperature of the outlet of the all-in-one cooling liquid is higher than the seventh temperature and lower than or equal to the ninth temperature, the gear of the minimum fan rotating speed meeting the requirements of the all-in-one cooling and heat dissipation is a fourth gear; when the temperature of the all-in-one cooling liquid outlet is lower than the seventh temperature, the gear of the minimum fan rotating speed meeting the all-in-one cooling heat dissipation requirement is the first gear.
7. The pure electric vehicle fan control method according to claim 1, wherein determining the minimum fan speed that meets the heat dissipation requirement of the motor based on the motor coolant outlet temperature comprises:
and determining the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor based on the fourth corresponding relation between the outlet temperature of the motor cooling liquid and the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor.
8. The pure electric vehicle fan control method according to claim 1, wherein the fourth correspondence relationship between the motor coolant outlet temperature and the gear of the minimum fan speed that meets the heat dissipation requirement of the motor includes:
if the temperature of the motor cooling liquid outlet is in a range from the first temperature to the fifth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a first gear;
if the temperature of the motor cooling liquid outlet is in a range from the fifth temperature to the sixth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a second gear;
if the temperature of the motor cooling liquid outlet is in a range from the sixth temperature to the seventh temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a third gear;
if the temperature of the motor cooling liquid outlet is in a range from the seventh temperature to the tenth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a fifth gear;
if the temperature of the motor cooling liquid outlet is in a tenth temperature range to a twelfth temperature range, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is a seventh gear;
and when the temperature of the motor cooling liquid outlet is between the twelfth temperature and the thirteenth temperature, the gear of the minimum fan rotating speed meeting the heat dissipation requirement of the motor is the eighth gear.
9. A pure electric vehicle comprises a vehicle body, wherein the vehicle body is provided with at least one control unit for driving a fan, the control unit is connected with a storage unit, the control unit is directly or indirectly connected with a signal acquisition unit, the signal acquisition unit is used for acquiring the rotating speed of a compressor of an air conditioner, the outlet pressure of a condenser refrigerant of the air conditioner, the ambient temperature, the outlet temperature of an all-in-one cooling liquid and the outlet temperature of a motor cooling liquid, and the storage unit is used for storing a computer program, and the pure electric vehicle is characterized in that the computer program is executed by the control unit to realize the fan control method according to any one of claims 1-8.
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| CN115817113B (en) | 2024-06-11 |
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